Pipe tongs



J. C. GREEN Aug. 15, 1933.

PIPE TONGS Filed Oct. 28, 1930 Ja/M/ cm1/0 MEE/v.

Patented Aug.15,1933 l f y 1,922,128

. NUNITEDSllArEs PATENT OFFICE i PIPE ToNGs .Y lohn Gland Green,Dlibach',` La., assignor of onethir'd' toThcmas L. Owen, Dubach, La.

Application october` 23,1930. serial No. 491,775 s 1 claim. k(clairnav)l This invention appertains to wrenches and ing ina head 6. The rear endof the handle can m02@ Dallllll1y-130` Wrenches 0f the typeparf beprovided with any preferred type of grip ticularly adapted` for use onround work, such plates 7, formed of leather, wood, rubber, orY the aspipes and the like. like.

5 One of the primary objects of my invention is The opposite sides ofthe head 6 are recessed 60:

150 DIOVdS a Dip@ Wrench O1' 'GOIlgS Comprising as'at 8, for receivingthe shank portions 9 of the rigid jaws for engaging one side of thework, and jaw plates and 11. These jaw plates are ara flexible chain forengaging about the work, rangedin spaced parallel reaction to one anwithnovel cooperating 'means carried by the other and are of a substantiallykdiamond shape 10 ,chain and jaws for adjustably locking the in sideelevation. The upper edges of the jawl 65 chain with the jaws. plates 10and 11 adjacent to the inner ends Another salient object of my-inventionis to thereof and in rear of Vthe transverse center provide a reversiblepipe wrench or tong of the thereof is provided with a bridge block 12and chain type, that is a wrench which can be utithis block is held inplace by removable bolts 15 lized for turning the Work both in aclockwise 13 passing through the depending portion of 70': and counterclockwise direction, the wrench inthe bridge block 12 for securing thebridge block cluding a rigid `jaw for engaging one side of the firmlybetween the jaw plates 10 and 11. This Work having oppositely directedteeth arranged bridge block 12 overhangs the upper edges of on aninclined plane, with a chain for engaging the jaw plates 10 and 11 asshown in Figure 2,

` .about the `work pivotally connected to the rigid for the purpose ofrelieving strain from the re- 75j-,

jaw intermediatethe ends thereof and substanmovable bolt 3 andpermitting the upper edges tially at the point of meeting of theoppositely of the jaw plates 10 and 11 to take up the strain directedteeth, the jaw carrying means for lockplaced upon the holding chain 17.The outer ing the chain in an adjusted position. face `of the bridgeblock is provided with a pair A further important object of my`invention is of spaced hooks 14, which form a lock for the 80' theprovision of novel means for forming the holding chain 15. One end ofthe chain is left rigid jaw and'novel `means for connecting the free andthe opposite end of the chain is pivotlocks for thechain'with the rigidkjaw. ally connected to the jaw plate 10 and 11 by Astill further objectof my invention is to means of a pivot bolt 15', which is arranged4providea pipe wrench of the above character, adjacent to the uppersurface of the jaw plate 85` whichwill be durable and efficient in use,one` substantially at the transverse center thereof.V that will besimple and easy to manufacture, The chain 15 is of substantially thesprocket and one which can be placed upon the martype and includes thelinks 16 pivotally connectket at a reasonable cost. ed together by pivotpins 17, which extend bei With these and other objects in view, the yondthe links. The links are adapted to be 90""A invention consists in thenovel construction, arreceived betweenthe hooks 14 and the terminalsrangement and formation of parts, as will be of the pivot pins seat inthe bill of the hook to hereinafter more specifically described,claimed, bring about the locking engagement of the chain Vandillustrated. in the accompanying drawing, in with the jaw plates.

which drawingz- The lower edges of the jaw plates 10 and 11 951` Figure1 is a side elevation of my improved incline upwardly inoppositedirections to form wrench, showing the chain placed about the thesubstantially diamond shape of said jaw work. plates and these loweredges are provided with Figure 2` is a top plan view of the wrenchVoppositely directed bighting teeth 18 and 19.

4.5 showing parts thereof broken away and in sec- In use of my improvedwrench or pipe tongs 10G tion. the jaw plates are placed overv or inengagement i i Figure 3 is a transverse section through the with theround work and the chain 15 is brought wrench taken on the line 3-3 ofFigure 1 lookabout the same and the free end of the chain ing in the'direction of the arrows. is brought between the jaw plates and theadja- 1 50,. Referring to the drawing in detail, wherein cent pivot pins17 of the chain is `received in 105E similar reference charactersdesignate `correthe bill of the hooks 14.

sponding parts throughout the several views, The work can now be swungon either side the letter A generally indicates my improved of thetransverse center of the jaw plates for pipe wrench or tong, whichincludes an elonengagement either with theV teeth 18 or 19, and

"L gated handle 5, having its forward end terminatthus the work can bereadily turned either in a lla' clockwise or counter clockwisedirection. Thus I have provided a wrench of a substantially reversiblenature in that the work can be freely turned either one way or theother.

From the foregoing description, it can be seen that an exceptionallysimple and durable pipe wrench has been provided in which the work willbe effectively gripped and in which a greater leverage can be obtainedthereon.

The block 12 can be readily removed when worn by merely removing thebolt 13 and thus this block can be readily and easy replaced whennecessary or desirable.

Changes in details may be made without departing from the spirit or thescope of this invention, but:-

What I claim as new is: j

A wrench for round work comprising a handle, a plurality of spaced rigidjaws xedly secured to said handle, said jaws being provided withupwardly inclined lower edges and upper inclined edges, oppositelydirected ratchet teeth formed upon said lower edges, a gripping chain, apivot bolt connecting one end of said gripping chain to the jawssubstantially at the meeting point of the'upper inclined edges of thejaws, a removable bolt carried by the jaws, said pivot bolt beingmounted in the rear of said removable bolt whereby the free end of saidgripping chain when secured will overhang said pivot bolt, a bridgeblock having a depending portion extending between said jaws, saidremovable bolt engaging said depending portion and Xedly securing saidbridge block between the jaws, said bridge block overhanging the upperedges of said jaws and provided with a pair of spaced hooks upon theupper face thereof, said gripping chain adapted to pass between the jawsand t over the top of said bridge block and engage said hooks fordetachably securing the chain to said bridge block, the overhangingbridge block being adapted to transmit the strain from the chain to thetop edges of said spaced jaw plates.

JOHN CLAUD GREEN.-

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